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  • 1
    Digitale Medien
    Digitale Medien
    Pion exchange and the H1 forward spectrometer data (1999)
    Springer
    The European physical journal 9 (1999), S. 267-269 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. We point out that the $\Delta\pi$ component of the nucleon wave function is vital to the interpretation of the recent H1 data for leading baryon production. While the n/p ratio is equal to two with the $N\pi$ component alone, the inclusion of the $\Delta\pi$ component brings this ratio very near to unity, as observed in the experiment. This result demonstrates that pion exchange can not only account for leading neutron but also for a large fraction of the leading proton production.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100529900053
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Charm in the nucleon (1999)
    Springer
    The European physical journal 11 (1999), S. 673-683 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. A next-to-leading order analysis of inelastic electroproduction of charm is performed using an interpolating scheme which maps smoothly onto massless QCD evolution at large $Q^2$ and photon–gluon fusion at small $Q^2$ . In contrast with earlier analyses, this scheme allows the inclusion of quark and target mass effects and heavy quark thresholds, as well as possible non-perturbative, or intrinsic, charm contributions. We find no conclusive evidence in favor of an intrinsic charm component in the nucleon, although several data points which disagree with perturbative QCD expectations will need to be checked by future experiments.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100529900189
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  • 3
    Digitale Medien
    Digitale Medien
    On studying charm in nuclei through antiproton annihilation (1999)
    Springer
    The European physical journal 6 (1999), S. 351-359 
    Details
    ISSN: 1434-601X
    Schlagwort(e): PACS: 25.43.+t Antiproton-induced reactions – 21.65.+f Nuclear matter – 14.40.Lb Charmed mesons – 14.65.Dw Charmed quarks
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: We examine the production of open charm in antiproton annihilation on finite nuclei. The enhancement of the subthreshold production cross section, even in a nucleus as light as carbon, should provide a clean signature of the reduction in the masses of these mesons in-medium. We also show that a careful analysis of the D+ and D− spectra can yield important information on the cross section for D±N scattering.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100500050353
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